Research - Video 7

Zorg ZF-1 Gun

Research - Video 8

Can't find any specific weapons shots, but it is sort of one huge weapon.

Research - Video 6

Blasters are amazing, as illustrated here:

Research - Video 5

Awesome Tron Discs

Research - Video 4

He's Holding a Thermal Detonator!!

Research - Video 3

the crap green lantern

Research - Video 2

this is the closest i can get to a video for this

Noisy Cricket - Men In Black

Research - Video 1

Star Trek - Phasers

sort of off topic, but still amazing

http://www.youtube.com/watch?v=Z1eFdUSnaQM&NR=1

10 Best Science Fiction Weapons

10. Phasers - Star Trek

9. Flashlight Laser - Ringworld

8. The cute little Cricket gun from Men in Black

7. Green Lanterns Ring.

6. Thermal Detonator - Star Wars

5. Tron Disc.

4. Blaster - Star Wars

3. Zorg's ZF-1 gun Fifth Element

2. Predator - Predator Films

1. Lightsaber